Exercise and Motor Training in People with Parkinson's Disease: A Systematic Review of Participant Characteristics, Intervention Delivery, Retention Rates, Adherence, and Adverse Events in Clinical Trials

Table 2

Dropout reasons when related to the intervention.

First author and year	Dropout reason	Number of participants
Allen 2010	Did not want to do the intervention	1
Ashburn 2007	Falls (but not during intervention)	1
Blackinton 2002	Safety concerns	1
Braun 2011	Imagery too confronting	1
Burini 2006	Poor adherence to exercise;	2
	back pain	1
de Bruin 2010	No access to necessary equipment	1
Dereli 2010	Did not want to do the intervention	1
Hackney 2008 (also as [54])	Exercise not intense enough;	1
	transport problems	2
Hackney 2009 (also as [54])	Knee pain;	1
	transport problems	2
Hackney 2010	Travel distance;	2
	classes too fatiguing;	1
	lack of interest	1
Hirsch 2003	Inguinal hernia	1
Kurtais 2008	Poor adherence to exercise	1
Sage 2009	Time commitment	4
Schmitz-Hubsch 2006	Uncomfortable in the group;	1
	uncomfortable with Qigong	1
Smania 2010	Uncooperative	4
Stallibrass 2002	Could not travel	1
Yang 2010	Low motivation;	1
	transport problems	1